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[Solutions] Saturday CSAT Quiz #16

saturday-solution

[Solutions]

Directions: Read the passage given below and answer the questions that follow:

The Food and Drug Administration has recently proposed severe restrictions on the use of antibiotics to promote the health and growth of meat animals. Medications added to feeds kill many microorganisms but also encourage the appearance of bacterial strains that are resistant to anti­-infective drugs. Already, for example, penicillin and the tetracyclines are not as effective therapeutically as they once were. The drug resistance is chiefly conferred by tiny circlets of genes, called plasmids that can be exchanged between different strains and even different species of bacteria. Plasmids are also one of the two kinds of vehicles (the other being viruses) that molecular biologists depend on when performing gene transplant experiments. Even present guidelines forbid the laboratory use of plasmids bearing genes for resistance to antibiotics. Yet, while congressional debate rages over whether or not to toughen these restrictions on scientists in their laboratories, little congressional attention has been focused on an ill-­advised agricultural practice that produces known deleterious effects.

Q.1 The author is primarily concerned with:

1. Discovering methods of eliminating drug­resistant bacteria

2. Regulation of gene transplant experiments

3. Problematic agricultural practice and its serious genetic consequences

4. Ineffectiveness of anti-­infective drugs

Select the correct answer from the codes given below:

a) 1 and 2 only

b) 2 only

c) 3 only

d) 1 and 4 only

Solution: The Food and Drug Administration’s restriction has been used to introduce the problem. In the passage, the author is primarily concerned with describing a problematic agricultural practice and its serious genetic consequences. Mostly he had discussed about the same in the above passage.

Answer c)

 

Q.2 Which of the following happens as the result in the exchange of plasmids between different bacteria?

a) Viruses become obsolete for gene transplantation experiments

b) Microorganisms get killed

c) The bacteria lose their potency

d)Microorganisms develop resistance to drugs

 

Solution: The drug resistance is chiefly conferred by plasmids.

Answer d)

 

Q.3 Those in favour of stiffening the restrictions on gene transplant should:

a) Boost experiments with any plasmids, except those with genes for antibiotic resistance

b) Discuss the restrictions imposed on scientists in lab experiments

c) Encourage the development of meatier livestock through the use of antibiotics

d)  Favour congressional debate and discussion of all health issues of meat animals

Solution: In these lines “Even present guidelines….known deleterious effects” the author clearly objects the use of plasmids bearing genes for resistance to antibiotics. So he would expect the authorities to do the opposite.

Answer a)

 

Q.4 The author’s outlook toward the progress of developing bacterial strains that render ineffective antibiotic drugs can be labeled as:

a) insincere

b) apprehensive

c) indifferent

d) perplexed

Solution: Medications added to feeds kill many microorganisms but also encourage the appearance of bacterial strains that are resistant to

anti­infective drugs. Here authors show his acceptance with the fact those bacterial strains are resistant to drugs.

Answer. b

 

Q.5 Menaka travels for certain distance with the speed of 15 km/hr and the remaining distance at 40 km/hr. The total distance travelled is 140 km and the total time taken is 6 hours. For how long she travelled at the speed of 15 km/hr?

a) 5 hrs

b) 2.5 hrs

c) 3 hrs

d) 4 hrs

Solution:

Let a be the time travelled with the speed of 15 km/hr. The distance travelled with the speed of 15 km/hr = 15a

The distance travelled with the speed of 40 km/hr = 40(6­a) 15a + 40(6­a) = 140

15a – 40a + 240 = 140 25a = 100

a = 4 hrs.

Answer d)

 

Q.6 Due to shortage in the supply, the price of Mango is increasing in the market. With each day, the price increases by Rs. 5/kg. Kiran buys 1 kg of Mango everyday. If the price of mango is Rs. 10/kg today, what is the total money kiran would have spent after 10 days for buying mangoes?

a) 325

b) 105

c) 265

d) 500

Solution: The initial price = 10
Increase per day = 5
After 10 days, the money spent = n/2 [2a+(n­1)d] = 10/2 [2×10 + 9×5] = 5 x 65
= 325

Answer a)

 

Q.7 Consider the following figure:

Screenshot 2016-07-23 01.01.37

From the following 4 options, select the correct letter­-number pair to fill the question marks in the main figure.

a) L ­ 12

b) L ­ 13

c) M ­ 13

d) M – 12

Solution: The gap between the letters increases by 1 in alphabetical order. D,(E),F,(G,H),I,(J,K,L,),M. The number of the letter in the alphabetical order is represented below the letter.

Answer c)

 

Q.8 Aruna is taller than Bindu but not as tall as Chaitra. Damini is taller than Eva but not as tall as Bindu. Who among them is the tallest?

a) Bindu

b) Chaitra

c) Aruna

d) Eva

Solution.: Aruna is taller than Bindu but not as tall as Chaitra. The arrangement as per the height will be
→ C­A­B (in the decreasing order)
Damini is taller than Eva but not as tall as Bindu.

→ B­D­E Combining both, → C­A­B­D­E

Answer b)

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  • Rajnikanth_007

    total distance covered is 140 and if u subtract 40 we get 100. Because 100 is not divisible by 15, subtract another 40. We now get 60. This is divisible by 15 and we get answer as 4. Also verify the same with respect to 80 kms in 2 hrs at 40 km/hr. Total 4 +2 hrs= 6hrs

  • ShwethaB

    can anyone explain q 5 plz?

  • Gautam Himanshu

    7/8